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/arch/sh/include/asm/user.h

http://github.com/mirrors/linux
C Header | 68 lines | 39 code | 6 blank | 23 comment | 1 complexity | 1ba6142e44da9228177fa08117cf8a80 MD5 | raw file
 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_USER_H
 3#define __ASM_SH_USER_H
 4
 5#include <asm/ptrace.h>
 6#include <asm/page.h>
 7
 8/*
 9 * Core file format: The core file is written in such a way that gdb
10 * can understand it and provide useful information to the user (under
11 * linux we use the `trad-core' bfd).  The file contents are as follows:
12 *
13 *  upage: 1 page consisting of a user struct that tells gdb
14 *	what is present in the file.  Directly after this is a
15 *	copy of the task_struct, which is currently not used by gdb,
16 *	but it may come in handy at some point.  All of the registers
17 *	are stored as part of the upage.  The upage should always be
18 *	only one page long.
19 *  data: The data segment follows next.  We use current->end_text to
20 *	current->brk to pick up all of the user variables, plus any memory
21 *	that may have been sbrk'ed.  No attempt is made to determine if a
22 *	page is demand-zero or if a page is totally unused, we just cover
23 *	the entire range.  All of the addresses are rounded in such a way
24 *	that an integral number of pages is written.
25 *  stack: We need the stack information in order to get a meaningful
26 *	backtrace.  We need to write the data from usp to
27 *	current->start_stack, so we round each of these in order to be able
28 *	to write an integer number of pages.
29 */
30
31#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
32struct user_fpu_struct {
33	unsigned long fp_regs[32];
34	unsigned int fpscr;
35};
36#else
37struct user_fpu_struct {
38	unsigned long fp_regs[16];
39	unsigned long xfp_regs[16];
40	unsigned long fpscr;
41	unsigned long fpul;
42};
43#endif
44
45struct user {
46	struct pt_regs	regs;			/* entire machine state */
47	struct user_fpu_struct fpu;	/* Math Co-processor registers  */
48	int u_fpvalid;		/* True if math co-processor being used */
49	size_t		u_tsize;		/* text size (pages) */
50	size_t		u_dsize;		/* data size (pages) */
51	size_t		u_ssize;		/* stack size (pages) */
52	unsigned long	start_code;		/* text starting address */
53	unsigned long	start_data;		/* data starting address */
54	unsigned long	start_stack;		/* stack starting address */
55	long int	signal;			/* signal causing core dump */
56	unsigned long	u_ar0;			/* help gdb find registers */
57	struct user_fpu_struct* u_fpstate;	/* Math Co-processor pointer */
58	unsigned long	magic;			/* identifies a core file */
59	char		u_comm[32];		/* user command name */
60};
61
62#define NBPG			PAGE_SIZE
63#define UPAGES			1
64#define HOST_TEXT_START_ADDR	(u.start_code)
65#define HOST_DATA_START_ADDR	(u.start_data)
66#define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)
67
68#endif /* __ASM_SH_USER_H */